Slowly.... yesterdays ride 113 miles, heat index 102, temp around 95, partly cloudy Took a little under 9 hours ride time but 12 hours total time. I am gonna start planning night rides and just sleep during the day. The heat doesn't bother me but the sun is what worries me. There is just no way to protect yourself with sunscreen and thin clothing for 9 to 12 hours in the TX sun.